A second juvenile genius has discovered that fairies do exist, and she is determined to capture one for scientific study: a demon - the most human-hating species known to man. Only an ancient time spell separates the demons from mankind - and Artemis must prevent it from unravelling or the bloodthirsty tribe will relaunch their quest to wipe every human from the planet.

There can be only one winner - and this time it might not be Artemis Fowl.